Mgco3=mgo+co2
n(mgco3)= 15/84= 0.18моль
nmgo=0.18 моль
m(mgo)=0.18×40=7.2г
7.2г -100%
Х- 97%
Х=7.2×97/100=6.984г
Ω% = m в-ва*100%/m р-ра = 2,5*100/50 = 5%
R1=k[so2]*[cl2]
r2 = k*2/3[so2]*2/3[cl2]
r1/r2=1/4/9=9/4=2.25
r1=2.25r2
<span>уменьшилась в 2.25 раза</span>
Fe O
W%(Fe)= 56*1/72*100%=77,8%
Fe₂O₃
W%(Fe)=56*2/160*100%=70%
1)2Ca+O2=2CaO
CaO+H2O=Ca(OH)2
Ca(OH)2+HCL=CaCL2+H2O
2)2Cu+O2=2CuO
CuO+2HCL=CuCL2+H2O
CuCL2=(t) Cu + CL2
3)2Cu+O2=2CuO
CuO+H2SO4=СuH2SO4+H2O